Giveing me an error when inputing date

I have this weird problem, I have my forms set up so that I can put a date range in the boxes, a start data in one, and the end date in the other. This works great and have been using this for a couple of months now. Here is the weird part. For some reason when I wanted the date range Feb 1, 2015 to Feb 28, 2015. I get an error message. Not I can go from Jan 1, 2015 to Feb 1, 2015, or from Feb 3, 2015 to Feb 28, 2015. For some reason it does not like Feb 2, 2015 date. I am not sure what would be causing this. I hope someone has some great ideas.

Thanks in advance.

Tony :banghead:

Giveing me an error when inputing date